hey dodge heads I recently bought wife low mileage 99 durango 5.2 but been headache from start i went to school for 3 yrs for auto tech and worked 6 years at 3 different private garages and i must say this one has me stumped i no longer work in the field and the guy i trust most is at a loss short story is getting lean code but car is running so rich fowling out clean oil in about 4 to 5 days of driving i have replaced all tune up stuff fuel rail & inj 02 sensors and more any ideas please i'm ears open for dodge tech

 

Welcome to DF. Moving to the correct section.

 

What kind of o2 sensors did you use? I've heard a lot of people say that most aftermarket ones don't work well (expecially bosch), that you need oem ones (made by denso I believe).

 

i think he used bosch 02 other small fact i left out was the reason fuel rail was replaced to begin with is there was a small fire ontop of manifold but all damage looks superficial

 

Those Bosch o2 sensors could certainly be a problem. Precat sensor sends data to the computer to adjust mixture, postcat sensor just monitors.

 

i know something is telling computer car is running lean but when i unplug pre 02 car continues to run ****ty you would think if its the 02 there would be difference on computer

 

It should run based on pre-programmed parameters just like it does until the sensors warm up on a cold start.